Speed-regulating device for automobiles.



No 861,378. I PATENTED JULY 3 0 1907. H. MAYER. SPEED REGULATING DEVICE FOR AUTOMOBILES.

APPLIOATION FILED AUG. 2, 1906.

2 SHEETS-SHEET 1.

MVEMTOR qgwmw. 14174 PATENTED JULY 30, 1907.

H. MAYER. SPEED REGULATING DEVICE FOR AUTOMOBILES.

APPLICATION Mnsn AUG. 2,v 1906.

2 SHEETS-SHEET 2,

IN vEA/Ta a W1 T/v E5555 w UNITED sTA ns PATENT OFFICE.

HEINRICH MAYER, OF ARBON, SWITZERLAND, ASSIGNOR TO THE FIRM OF ADOLPH SAURER,

' OF ARBON, SWITZERLAND.

Specification ofLetters-Patent.

, Patented J u1 v 30. 1907.

Application iilsd August 2, 1906. Serial No. 328,932-

To all whom it may concern:

Be it known that I, HEINRICH MAYER, a citizen of the Confederation of Switzerland, residing at Arbon, in Switzerland, have invented a new and useful Speed- Regulating Device for Automobiles, of which the .following is a specification.

There are known speed regulating devices for automobiles, which are inserted between the carbureters and the explosion motors, and in which a governor of any known construction and provided either with weights or with springs is employed for regulating the speed of the motor by means of a lever and rod transmission, while a distributing piston-valve is disposed in the passage for the explosive mixture and is adapted to increase or to decrease the area in accordance with the momentary work performed by the motor. The said governor therefore served for maintaining a certain and constant number of revolutions. In practice it was found necessary to employ an additional regulator (commonly called the accelerator) and to actuate the same by hand. This additional regulator, however, was arranged to directly influence the path or the springs of the above-said governor and therefore it produced the defect, that. the automatic governor was thereby practically rendered inoperative and unsafe,

sudden decrease of the load of the motor the latter was liable to run fast, in other words the normal speed of the motor was at once increased, unless at the same time the accelerator is so operated as to regulate the speed.

Fig. 2, and Fig. 2 is a vertical section at right angles:

thereto through the line w-x in Fig. 1.

Similar characters of reference refer to similarparts in both views.

The lower parts of Figs. 1 and 2 represent a carbureter with two benzin nozzles 1 and '2' for a benzin motor with one or several cylinders. Thecarbureter may be of any known construction, the essential point being, that a. mixture of air and benzin or the like be therein formed. This carburetor is connected with'a casing L, which in turn is connected by branches M and N with the inlet of the one cylinder or the' inlets of the several cylinders. A known distributing piston-valve D is mounted in the lower cylindrical part ofthe casing L to reciprocate and is rigidly connected with a vertical spindle 7. The latter is provided at its upper end with 'a crosshead 6, in the two recesses of which a forked lever F engages. This lever F is by its shaft 9 rigidly connected with a lever 10, which is controlled from some governor (not shown) by means of the rod 11. The casingL is provided with-an upper cylindrical part 13, in which according to my invention an accelerating piston-valve H is mounted to reciprocate. It is provided with a partition and with a central sleeve 8, which latter can slide up and down on the vertical spindle 7. Ports 8 are formed in the walls of said pis ton valve H above the partition so that the top of the.

casing L will be in communication with .the branches N M when the valve is in its lowermost position to prevent the formation of a vacuum in said casing. The lower edge of the piston-valve H is preferably beveled off and can rest on a correspondingseat 19 in the casing L. The internal surface of the accelerating pistonvalve H at its lower edge can slide on the external'surtrolled from the drivers seat by means of a rod 16 and a I suitable lever and rod transmission. It will be noted,

that the spindle 7 is at all times permitted to slide inthecentral sleeve 8 of the accelerating piston-valve H. In-the uppermost position of'the accelerating pistonvalve '11 shown at Fig. 1 an annular space will be left between its lower edge and the upper edge of the piston-valve D for the passage of the explosive mixture from the carbureter to the tube M N. The said annular space corresponds to the maximum speed and full load of the motor. The upper edge of thedistributing piston-valve D is preferably made to slightly slope to- ,wards the' central linefrom two opposite sides and is provided withtwo'opposite notches in the said central line, as is shown at Fig. 2. Thereby the area between the two opposite edges of the two piston-valves D and H is made to slowly and gradually increase at the commencement of the upward motion of the accelerating piston-valve H. When the latter occupies its lowermost position shown at Fig. 2, it will shut off the carbu- 'reter from the tube M N and the inlets of. the one or several cylinders, no matter, what position the'distrib-' uting pistonvalve D may at the moment occupy.- At the top of the casing L a cover 20 may be provided as shown.

The two nozzles 1 and 2 of the carburetor are arranged to be supplied-with benzinthroughthe common channel 21 from a supply tube,22 by meansjoffa'valve 23 under the control of a float 24'witln'n a box 25. Air can be sucked in from without through a tube 26 in the direction of the arrow and can pass upward in the two air-passages B and C, which surround the mouths of the two nozzles 1 and 2. The one air-passage B is normally closed with'a trap or clack-valve 5, which is fastened onva shaft 27 rocking in the casing and carrying an arnf 28. The free end of the latter is pivotally connected with a piston 29 by means of'a rod 30. The piston 29 reciprocates in a cylinder 31, which is arranged to rock on the casing and is provided in its bottom with an airhole 32. A helical spring 33 is inserted between the piston 29 and the. cover of the cylinder 31 and serves for pressing the trap or clack-valve 5 on its seat. The clack-valve 5 is arranged to be more or less opened by .the draft produced from the'cylinder or-either of the is at rest, the accelerating piston-valve H will nonnally rest on its seat 19 and the forked lever F will occupy its lowermost position, so that the distributing pistonvalve D in its lowermost position would present the largest area to the passage ofthe mixture, if the other piston-valve H were not there. The driver starts the motor in any known manner and brings'by' the respective'lever and rod'transrnission 16, 15 the forked lever G with the accelerating piston-valve H into any intermediate position, so that the annular space between the two piston-valves H and is produced. The g0v-. ernor having been meanwhile started'will bring by the parts 11, 10, 9, E 6 and 7 the distributing piston-valve more or less into the position shown at Fig. 1. The explosive mixture having been prepared in the carbureter below during the draft will be sucked in from either the passage C alone 'or from both passages B and O, in

'which case the trap or clack-valve 5 is more or less I opened, and will be conducted through the distributing piston-valve D, through the annular area between both piston-valves D and H and through the branch M or Ntothe respective cylinder. Shouldit from some reason be necessary to increase or decrease the quantity'bf mixture admittedto the respective cylinder,

the driver may by the transmission 16, 15, 1e and G raise orlo'wer the accelerating-piston-valve H respec-.

tively; The governor will during this time not be in terfere'd with at all, so that it is permitted to adjust the v distributing piston-valve D, should the. speed of the motor exceed the desired speedior'sink belowthe same.

1 H the driver desires'to gradually reduce the speed of the automobile, he may slowly lower the accelerating piston-valve H and thereby gradually diminish the an-- nu1ar space between the two piston-valves H and D.

It will be noted, that the driver isat all times permitted to use the-accelerating piston-valve H without troubling himself about the position of the governor.

The speed regulating device may be variedin many respects without deviating from the spirit of my inven- 1 claim: 1. In an automobile having an explosion-motor with a governor 'the, combination with a csrbureter adapted to produce an explosive mixture; of a casing communicating" with snid carburetor, connections between said casing and the explosion-motor, u tubular distributing pistonwnlve mounted to reciprocate in said casing, means controlled from the governor for actuating said distributing pistonvnlve, an accelerating piston-valve mounted to reciprocate in suidcasing in addition to the distributing,pistorrvulve, said accelerating piston-valve in its one extreme position closing the distributing. valvefor shutting off'tlie supply of explosive mixture, and' means controlled from the drivers seat for actuating said accelerating piston-valve.

2. In an automobile having an'wxplosirin-motor with a governor, the comblnationwith a carburetor adapted 'to produce an explosive mixture, of a casing having two .cylindrlcnl parts of which the lower one communicates with suid carburetor, connections between said casing and the explosion-motor, a. tubular-distributing pistonvalvemounted to reciprocate in the lower cylindrical part of said casmixture,- while in any other position a space is formed be tween these two edges for thepassnge of the explosive 3. In an automobile havlngjan explosion-motor witha governor,- the combination 'with a carbui-eten adaptedto llndrical parts of which the lower one cbmmunicntes'with said carbu'reter, connections between said casing and the explosion-motor, a tubulardistributing piston-valve mount 7 ed to reciprocate in the lower cylindrical part of said casfl ing, a vertical spindle bonnected with said distributing piston-valve, a horizontal shnftmounted in said ceasing 'mixture,.-and means controlled from the driver's seat for actuating said accelerating pistonwalve'.

produce an explosivemixture, of .a casing having two cy-' 100,

to rock, an arm fastened on said horizontal shaft and pivotally connected with the upper end ot'suid verticalspin-f die, .a lever fastened without on said horizontal. shaft means controlled from the governor for actuating said, lever, an" accelerating piston-valve" open at the lower; end

and mountedto reciprocate in the'upper cylindrical part of said casing and to slidewith its central sleeyeon said vertical spindle, 'its' lower edge lieingj adapted to rest in i the lowermost position on a seat in said casing and to encircle the upper edge of said distributing piston-valve for" shutting off the supplyof explosive mixture, while lnnny other position a space is formed betweenlthese two edges for the passage of the'explosive mixture, a second horizontal shaft mounted. in said .casing to-roclga second arm fastened on said second horizontal shaft and 'pivotallv,v

connected with the upper end of the sleeve of said accelersiting piston-valve, a second lever, fastened .without on said second horizontal shaft, and means controlled from v the drivers seat for actuating said 'secondlsve'r,

4. The combination with a casing having an outlet and two superposed cylindricalparts of whiclr'the lower one can communicate with u:so.urce of fluids-tubular dis I trlbuting piston-valve mounted to reciprocute'ln the lower cylindrical part of said casing, averticnlspindleconnected with said distributing piston-valve, means for actuating snid vertical spindle, an accelerating piston-valve open at the lower end and mounted to'reciprocate in the uppercylindricnl part 0Q said casing and to'sllde on said vertical spindle, lts lower edge being adapted to rest in the-lowermost position on n seat in said casing and 'to encircle ,the

upper edge of said distributing piston-valve tor shutting off the supply of fluid, while in any other position a space is formed between these'two edges for the passage of fluid,

and means for actxiating sold accelerating PlStODwVfliVQ- 1 

